EP 0849706 A3 19981111 - Adaptive noise removal for video images
Title (en)
Adaptive noise removal for video images
Title (de)
Adaptive Rauschverminderung vom Videobildern
Title (fr)
Réduction adaptative de bruit pour des images vidéo
Publication
Application
Priority
US 76735296 A 19961218
Abstract (en)
[origin: EP0849706A2] A method of applying noise removal to an image so that the areas having the greatest variance have the least correction. First, the variance between each image pixel and its surrounding pixels is determined. Next, for the neighborhood around each pixel, a density of variance is determined. Finally the density of variance for the neighborhood around each pixel is used to correct the original pixel, the direction of correction being toward the mean value in the surrounding pixels. The result is that relatively uniform areas of the image, within which noise is most obvious, will get the most correction and areas that are textured will get the least. <IMAGE>
IPC 1-7
IPC 8 full level
G06T 5/00 (2006.01); G06T 5/20 (2006.01); H04N 1/409 (2006.01)
CPC (source: EP US)
G06T 5/20 (2013.01 - EP US)
Citation (search report)
- [X] EP 0531904 A2 19930317 - EASTMAN KODAK CO [US]
- [A] EP 0398861 A2 19901122 - POLAROID CORP [US]
- [A] AMLAN KUNDU ET AL: "DOUBLE-WINDOW HODGES-LEHMAN (D) FILTER AND HYBRID D-MEDIAN FILTER FOR ROBUST IMAGE SMOOTHING", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, vol. 37, no. 8, August 1989 (1989-08-01), pages 1293 - 1298, XP000045957
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0849706 A2 19980624; EP 0849706 A3 19981111; EP 0849706 B1 20050406; DE 69732955 D1 20050512; DE 69732955 T2 20050908; JP H10187962 A 19980721; US 5768440 A 19980616
DOCDB simple family (application)
EP 97309994 A 19971211; DE 69732955 T 19971211; JP 33000097 A 19971201; US 76735296 A 19961218